arch/powerpc/sysdev/fsl_soc.c - kernel/msm-4.9 - Gitiles

 /*
  * FSL SoC setup code
  *
  * Maintained by Kumar Gala (see MAINTAINERS for contact information)
  *
  * 2006 (c) MontaVista Software, Inc.
  * Vitaly Bordug <vbordug@ru.mvista.com>
  *
  * This program is free software; you can redistribute  it and/or modify it
  * under  the terms of  the GNU General  Public License as published by the
  * Free Software Foundation;  either version 2 of the  License, or (at your
  * option) any later version.
  */

 #include <linux/stddef.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/errno.h>
 #include <linux/major.h>
 #include <linux/delay.h>
 #include <linux/irq.h>
 #include <linux/module.h>
 #include <linux/device.h>
 #include <linux/platform_device.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/phy.h>
 #include <linux/phy_fixed.h>
 #include <linux/spi/spi.h>
 #include <linux/fsl_devices.h>
 #include <linux/fs_enet_pd.h>
 #include <linux/fs_uart_pd.h>

 #include <asm/system.h>
 #include <asm/atomic.h>
 #include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/time.h>
 #include <asm/prom.h>
 #include <sysdev/fsl_soc.h>
 #include <mm/mmu_decl.h>
 #include <asm/cpm2.h>

 extern void init_fcc_ioports(struct fs_platform_info*);
 extern void init_fec_ioports(struct fs_platform_info*);
 extern void init_smc_ioports(struct fs_uart_platform_info*);
 static phys_addr_t immrbase = -1;

 phys_addr_t get_immrbase(void)
 {
 	struct device_node *soc;

 	if (immrbase != -1)
 		return immrbase;

 	soc = of_find_node_by_type(NULL, "soc");
 	if (soc) {
 		int size;
 		u32 naddr;
 		const u32 *prop = of_get_property(soc, "#address-cells", &size);

 		if (prop && size == 4)
 			naddr = *prop;
 		else
 			naddr = 2;

 		prop = of_get_property(soc, "ranges", &size);
 		if (prop)
 			immrbase = of_translate_address(soc, prop + naddr);

 		of_node_put(soc);
 	}

 	return immrbase;
 }

 EXPORT_SYMBOL(get_immrbase);

 static u32 sysfreq = -1;

 u32 fsl_get_sys_freq(void)
 {
 	struct device_node *soc;
 	const u32 *prop;
 	int size;

 	if (sysfreq != -1)
 		return sysfreq;

 	soc = of_find_node_by_type(NULL, "soc");
 	if (!soc)
 		return -1;

 	prop = of_get_property(soc, "clock-frequency", &size);
 	if (!prop || size != sizeof(*prop) || *prop == 0)
 		prop = of_get_property(soc, "bus-frequency", &size);

 	if (prop && size == sizeof(*prop))
 		sysfreq = *prop;

 	of_node_put(soc);
 	return sysfreq;
 }
 EXPORT_SYMBOL(fsl_get_sys_freq);

 #if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx)

 static u32 brgfreq = -1;

 u32 get_brgfreq(void)
 {
 	struct device_node *node;
 	const unsigned int *prop;
 	int size;

 	if (brgfreq != -1)
 		return brgfreq;

 	node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg");
 	if (node) {
 		prop = of_get_property(node, "clock-frequency", &size);
 		if (prop && size == 4)
 			brgfreq = *prop;

 		of_node_put(node);
 		return brgfreq;
 	}

 	/* Legacy device binding -- will go away when no users are left. */
 	node = of_find_node_by_type(NULL, "cpm");
 	if (!node)
 		node = of_find_compatible_node(NULL, NULL, "fsl,qe");
 	if (!node)
 		node = of_find_node_by_type(NULL, "qe");

 	if (node) {
 		prop = of_get_property(node, "brg-frequency", &size);
 		if (prop && size == 4)
 			brgfreq = *prop;

 		if (brgfreq == -1 || brgfreq == 0) {
 			prop = of_get_property(node, "bus-frequency", &size);
 			if (prop && size == 4)
 				brgfreq = *prop / 2;
 		}
 		of_node_put(node);
 	}

 	return brgfreq;
 }

 EXPORT_SYMBOL(get_brgfreq);

 static u32 fs_baudrate = -1;

 u32 get_baudrate(void)
 {
 	struct device_node *node;

 	if (fs_baudrate != -1)
 		return fs_baudrate;

 	node = of_find_node_by_type(NULL, "serial");
 	if (node) {
 		int size;
 		const unsigned int *prop = of_get_property(node,
 				"current-speed", &size);

 		if (prop)
 			fs_baudrate = *prop;
 		of_node_put(node);
 	}

 	return fs_baudrate;
 }

 EXPORT_SYMBOL(get_baudrate);
 #endif /* CONFIG_CPM2 */

 #ifdef CONFIG_FIXED_PHY
 static int __init of_add_fixed_phys(void)
 {
 	int ret;
 	struct device_node *np;
 	u32 *fixed_link;
 	struct fixed_phy_status status = {};

 	for_each_node_by_name(np, "ethernet") {
 		fixed_link  = (u32 *)of_get_property(np, "fixed-link", NULL);
 		if (!fixed_link)
 			continue;

 		status.link = 1;
 		status.duplex = fixed_link[1];
 		status.speed = fixed_link[2];
 		status.pause = fixed_link[3];
 		status.asym_pause = fixed_link[4];

 		ret = fixed_phy_add(PHY_POLL, fixed_link[0], &status);
 		if (ret) {
 			of_node_put(np);
 			return ret;
 		}
 	}

 	return 0;
 }
 arch_initcall(of_add_fixed_phys);
 #endif /* CONFIG_FIXED_PHY */

 static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
 {
 	if (!phy_type)
 		return FSL_USB2_PHY_NONE;
 	if (!strcasecmp(phy_type, "ulpi"))
 		return FSL_USB2_PHY_ULPI;
 	if (!strcasecmp(phy_type, "utmi"))
 		return FSL_USB2_PHY_UTMI;
 	if (!strcasecmp(phy_type, "utmi_wide"))
 		return FSL_USB2_PHY_UTMI_WIDE;
 	if (!strcasecmp(phy_type, "serial"))
 		return FSL_USB2_PHY_SERIAL;

 	return FSL_USB2_PHY_NONE;
 }

 static int __init fsl_usb_of_init(void)
 {
 	struct device_node *np;
 	unsigned int i = 0;
 	struct platform_device *usb_dev_mph = NULL, *usb_dev_dr_host = NULL,
 		*usb_dev_dr_client = NULL;
 	int ret;

 	for_each_compatible_node(np, NULL, "fsl-usb2-mph") {
 		struct resource r[2];
 		struct fsl_usb2_platform_data usb_data;
 		const unsigned char *prop = NULL;

 		memset(&r, 0, sizeof(r));
 		memset(&usb_data, 0, sizeof(usb_data));

 		ret = of_address_to_resource(np, 0, &r[0]);
 		if (ret)
 			goto err;

 		of_irq_to_resource(np, 0, &r[1]);

 		usb_dev_mph =
 		    platform_device_register_simple("fsl-ehci", i, r, 2);
 		if (IS_ERR(usb_dev_mph)) {
 			ret = PTR_ERR(usb_dev_mph);
 			goto err;
 		}

 		usb_dev_mph->dev.coherent_dma_mask = 0xffffffffUL;
 		usb_dev_mph->dev.dma_mask = &usb_dev_mph->dev.coherent_dma_mask;

 		usb_data.operating_mode = FSL_USB2_MPH_HOST;

 		prop = of_get_property(np, "port0", NULL);
 		if (prop)
 			usb_data.port_enables |= FSL_USB2_PORT0_ENABLED;

 		prop = of_get_property(np, "port1", NULL);
 		if (prop)
 			usb_data.port_enables |= FSL_USB2_PORT1_ENABLED;

 		prop = of_get_property(np, "phy_type", NULL);
 		usb_data.phy_mode = determine_usb_phy(prop);

 		ret =
 		    platform_device_add_data(usb_dev_mph, &usb_data,
 					     sizeof(struct
 						    fsl_usb2_platform_data));
 		if (ret)
 			goto unreg_mph;
 		i++;
 	}

 	for_each_compatible_node(np, NULL, "fsl-usb2-dr") {
 		struct resource r[2];
 		struct fsl_usb2_platform_data usb_data;
 		const unsigned char *prop = NULL;

 		if (!of_device_is_available(np))
 			continue;

 		memset(&r, 0, sizeof(r));
 		memset(&usb_data, 0, sizeof(usb_data));

 		ret = of_address_to_resource(np, 0, &r[0]);
 		if (ret)
 			goto unreg_mph;

 		of_irq_to_resource(np, 0, &r[1]);

 		prop = of_get_property(np, "dr_mode", NULL);

 		if (!prop || !strcmp(prop, "host")) {
 			usb_data.operating_mode = FSL_USB2_DR_HOST;
 			usb_dev_dr_host = platform_device_register_simple(
 					"fsl-ehci", i, r, 2);
 			if (IS_ERR(usb_dev_dr_host)) {
 				ret = PTR_ERR(usb_dev_dr_host);
 				goto err;
 			}
 		} else if (prop && !strcmp(prop, "peripheral")) {
 			usb_data.operating_mode = FSL_USB2_DR_DEVICE;
 			usb_dev_dr_client = platform_device_register_simple(
 					"fsl-usb2-udc", i, r, 2);
 			if (IS_ERR(usb_dev_dr_client)) {
 				ret = PTR_ERR(usb_dev_dr_client);
 				goto err;
 			}
 		} else if (prop && !strcmp(prop, "otg")) {
 			usb_data.operating_mode = FSL_USB2_DR_OTG;
 			usb_dev_dr_host = platform_device_register_simple(
 					"fsl-ehci", i, r, 2);
 			if (IS_ERR(usb_dev_dr_host)) {
 				ret = PTR_ERR(usb_dev_dr_host);
 				goto err;
 			}
 			usb_dev_dr_client = platform_device_register_simple(
 					"fsl-usb2-udc", i, r, 2);
 			if (IS_ERR(usb_dev_dr_client)) {
 				ret = PTR_ERR(usb_dev_dr_client);
 				goto err;
 			}
 		} else {
 			ret = -EINVAL;
 			goto err;
 		}

 		prop = of_get_property(np, "phy_type", NULL);
 		usb_data.phy_mode = determine_usb_phy(prop);

 		if (usb_dev_dr_host) {
 			usb_dev_dr_host->dev.coherent_dma_mask = 0xffffffffUL;
 			usb_dev_dr_host->dev.dma_mask = &usb_dev_dr_host->
 				dev.coherent_dma_mask;
 			if ((ret = platform_device_add_data(usb_dev_dr_host,
 						&usb_data, sizeof(struct
 						fsl_usb2_platform_data))))
 				goto unreg_dr;
 		}
 		if (usb_dev_dr_client) {
 			usb_dev_dr_client->dev.coherent_dma_mask = 0xffffffffUL;
 			usb_dev_dr_client->dev.dma_mask = &usb_dev_dr_client->
 				dev.coherent_dma_mask;
 			if ((ret = platform_device_add_data(usb_dev_dr_client,
 						&usb_data, sizeof(struct
 						fsl_usb2_platform_data))))
 				goto unreg_dr;
 		}
 		i++;
 	}
 	return 0;

 unreg_dr:
 	if (usb_dev_dr_host)
 		platform_device_unregister(usb_dev_dr_host);
 	if (usb_dev_dr_client)
 		platform_device_unregister(usb_dev_dr_client);
 unreg_mph:
 	if (usb_dev_mph)
 		platform_device_unregister(usb_dev_mph);
 err:
 	return ret;
 }

 arch_initcall(fsl_usb_of_init);

 #if defined(CONFIG_PPC_85xx) || defined(CONFIG_PPC_86xx)
 static __be32 __iomem *rstcr;

 static int __init setup_rstcr(void)
 {
 	struct device_node *np;
 	np = of_find_node_by_name(NULL, "global-utilities");
 	if ((np && of_get_property(np, "fsl,has-rstcr", NULL))) {
 		rstcr = of_iomap(np, 0) + 0xb0;
 		if (!rstcr)
 			printk (KERN_EMERG "Error: reset control register "
 					"not mapped!\n");
 	} else
 		printk (KERN_INFO "rstcr compatible register does not exist!\n");
 	if (np)
 		of_node_put(np);
 	return 0;
 }

 arch_initcall(setup_rstcr);

 void fsl_rstcr_restart(char *cmd)
 {
 	local_irq_disable();
 	if (rstcr)
 		/* set reset control register */
 		out_be32(rstcr, 0x2);	/* HRESET_REQ */

 	while (1) ;
 }
 #endif

 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
 struct platform_diu_data_ops diu_ops;
 EXPORT_SYMBOL(diu_ops);
 #endif
	/*
	* FSL SoC setup code
	*
	* Maintained by Kumar Gala (see MAINTAINERS for contact information)
	*
	* 2006 (c) MontaVista Software, Inc.
	* Vitaly Bordug <vbordug@ru.mvista.com>
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License as published by the
	* Free Software Foundation; either version 2 of the License, or (at your
	* option) any later version.
	*/

	#include <linux/stddef.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/errno.h>
	#include <linux/major.h>
	#include <linux/delay.h>
	#include <linux/irq.h>
	#include <linux/module.h>
	#include <linux/device.h>
	#include <linux/platform_device.h>
	#include <linux/of.h>
	#include <linux/of_platform.h>
	#include <linux/phy.h>
	#include <linux/phy_fixed.h>
	#include <linux/spi/spi.h>
	#include <linux/fsl_devices.h>
	#include <linux/fs_enet_pd.h>
	#include <linux/fs_uart_pd.h>

	#include <asm/system.h>
	#include <asm/atomic.h>
	#include <asm/io.h>
	#include <asm/irq.h>
	#include <asm/time.h>
	#include <asm/prom.h>
	#include <sysdev/fsl_soc.h>
	#include <mm/mmu_decl.h>
	#include <asm/cpm2.h>

	extern void init_fcc_ioports(struct fs_platform_info*);
	extern void init_fec_ioports(struct fs_platform_info*);
	extern void init_smc_ioports(struct fs_uart_platform_info*);
	static phys_addr_t immrbase = -1;

	phys_addr_t get_immrbase(void)
	{
	struct device_node *soc;

	if (immrbase != -1)
	return immrbase;

	soc = of_find_node_by_type(NULL, "soc");
	if (soc) {
	int size;
	u32 naddr;
	const u32 *prop = of_get_property(soc, "#address-cells", &size);

	if (prop && size == 4)
	naddr = *prop;
	else
	naddr = 2;

	prop = of_get_property(soc, "ranges", &size);
	if (prop)
	immrbase = of_translate_address(soc, prop + naddr);

	of_node_put(soc);
	}

	return immrbase;
	}

	EXPORT_SYMBOL(get_immrbase);

	static u32 sysfreq = -1;

	u32 fsl_get_sys_freq(void)
	{
	struct device_node *soc;
	const u32 *prop;
	int size;

	if (sysfreq != -1)
	return sysfreq;

	soc = of_find_node_by_type(NULL, "soc");
	if (!soc)
	return -1;

	prop = of_get_property(soc, "clock-frequency", &size);
	if (!prop \|\| size != sizeof(prop) \|\| prop == 0)
	prop = of_get_property(soc, "bus-frequency", &size);

	if (prop && size == sizeof(*prop))
	sysfreq = *prop;

	of_node_put(soc);
	return sysfreq;
	}
	EXPORT_SYMBOL(fsl_get_sys_freq);

	#if defined(CONFIG_CPM2) \|\| defined(CONFIG_QUICC_ENGINE) \|\| defined(CONFIG_8xx)

	static u32 brgfreq = -1;

	u32 get_brgfreq(void)
	{
	struct device_node *node;
	const unsigned int *prop;
	int size;

	if (brgfreq != -1)
	return brgfreq;

	node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg");
	if (node) {
	prop = of_get_property(node, "clock-frequency", &size);
	if (prop && size == 4)
	brgfreq = *prop;

	of_node_put(node);
	return brgfreq;
	}

	/* Legacy device binding -- will go away when no users are left. */
	node = of_find_node_by_type(NULL, "cpm");
	if (!node)
	node = of_find_compatible_node(NULL, NULL, "fsl,qe");
	if (!node)
	node = of_find_node_by_type(NULL, "qe");

	if (node) {
	prop = of_get_property(node, "brg-frequency", &size);
	if (prop && size == 4)
	brgfreq = *prop;

	if (brgfreq == -1 \|\| brgfreq == 0) {
	prop = of_get_property(node, "bus-frequency", &size);
	if (prop && size == 4)
	brgfreq = *prop / 2;
	}
	of_node_put(node);
	}

	return brgfreq;
	}

	EXPORT_SYMBOL(get_brgfreq);

	static u32 fs_baudrate = -1;

	u32 get_baudrate(void)
	{
	struct device_node *node;

	if (fs_baudrate != -1)
	return fs_baudrate;

	node = of_find_node_by_type(NULL, "serial");
	if (node) {
	int size;
	const unsigned int *prop = of_get_property(node,
	"current-speed", &size);

	if (prop)
	fs_baudrate = *prop;
	of_node_put(node);
	}

	return fs_baudrate;
	}

	EXPORT_SYMBOL(get_baudrate);
	#endif /* CONFIG_CPM2 */

	#ifdef CONFIG_FIXED_PHY
	static int __init of_add_fixed_phys(void)
	{
	int ret;
	struct device_node *np;
	u32 *fixed_link;
	struct fixed_phy_status status = {};

	for_each_node_by_name(np, "ethernet") {
	fixed_link = (u32 *)of_get_property(np, "fixed-link", NULL);
	if (!fixed_link)
	continue;

	status.link = 1;
	status.duplex = fixed_link[1];
	status.speed = fixed_link[2];
	status.pause = fixed_link[3];
	status.asym_pause = fixed_link[4];

	ret = fixed_phy_add(PHY_POLL, fixed_link[0], &status);
	if (ret) {
	of_node_put(np);
	return ret;
	}
	}

	return 0;
	}
	arch_initcall(of_add_fixed_phys);
	#endif /* CONFIG_FIXED_PHY */

	static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
	{
	if (!phy_type)
	return FSL_USB2_PHY_NONE;
	if (!strcasecmp(phy_type, "ulpi"))
	return FSL_USB2_PHY_ULPI;
	if (!strcasecmp(phy_type, "utmi"))
	return FSL_USB2_PHY_UTMI;
	if (!strcasecmp(phy_type, "utmi_wide"))
	return FSL_USB2_PHY_UTMI_WIDE;
	if (!strcasecmp(phy_type, "serial"))
	return FSL_USB2_PHY_SERIAL;

	return FSL_USB2_PHY_NONE;
	}

	static int __init fsl_usb_of_init(void)
	{
	struct device_node *np;
	unsigned int i = 0;
	struct platform_device usb_dev_mph = NULL, usb_dev_dr_host = NULL,
	*usb_dev_dr_client = NULL;
	int ret;

	for_each_compatible_node(np, NULL, "fsl-usb2-mph") {
	struct resource r[2];
	struct fsl_usb2_platform_data usb_data;
	const unsigned char *prop = NULL;

	memset(&r, 0, sizeof(r));
	memset(&usb_data, 0, sizeof(usb_data));

	ret = of_address_to_resource(np, 0, &r[0]);
	if (ret)
	goto err;

	of_irq_to_resource(np, 0, &r[1]);

	usb_dev_mph =
	platform_device_register_simple("fsl-ehci", i, r, 2);
	if (IS_ERR(usb_dev_mph)) {
	ret = PTR_ERR(usb_dev_mph);
	goto err;
	}

	usb_dev_mph->dev.coherent_dma_mask = 0xffffffffUL;
	usb_dev_mph->dev.dma_mask = &usb_dev_mph->dev.coherent_dma_mask;

	usb_data.operating_mode = FSL_USB2_MPH_HOST;

	prop = of_get_property(np, "port0", NULL);
	if (prop)
	usb_data.port_enables \|= FSL_USB2_PORT0_ENABLED;

	prop = of_get_property(np, "port1", NULL);
	if (prop)
	usb_data.port_enables \|= FSL_USB2_PORT1_ENABLED;

	prop = of_get_property(np, "phy_type", NULL);
	usb_data.phy_mode = determine_usb_phy(prop);

	ret =
	platform_device_add_data(usb_dev_mph, &usb_data,
	sizeof(struct
	fsl_usb2_platform_data));
	if (ret)
	goto unreg_mph;
	i++;
	}

	for_each_compatible_node(np, NULL, "fsl-usb2-dr") {
	struct resource r[2];
	struct fsl_usb2_platform_data usb_data;
	const unsigned char *prop = NULL;

	if (!of_device_is_available(np))
	continue;

	memset(&r, 0, sizeof(r));
	memset(&usb_data, 0, sizeof(usb_data));

	ret = of_address_to_resource(np, 0, &r[0]);
	if (ret)
	goto unreg_mph;

	of_irq_to_resource(np, 0, &r[1]);

	prop = of_get_property(np, "dr_mode", NULL);

	if (!prop \|\| !strcmp(prop, "host")) {
	usb_data.operating_mode = FSL_USB2_DR_HOST;
	usb_dev_dr_host = platform_device_register_simple(
	"fsl-ehci", i, r, 2);
	if (IS_ERR(usb_dev_dr_host)) {
	ret = PTR_ERR(usb_dev_dr_host);
	goto err;
	}
	} else if (prop && !strcmp(prop, "peripheral")) {
	usb_data.operating_mode = FSL_USB2_DR_DEVICE;
	usb_dev_dr_client = platform_device_register_simple(
	"fsl-usb2-udc", i, r, 2);
	if (IS_ERR(usb_dev_dr_client)) {
	ret = PTR_ERR(usb_dev_dr_client);
	goto err;
	}
	} else if (prop && !strcmp(prop, "otg")) {
	usb_data.operating_mode = FSL_USB2_DR_OTG;
	usb_dev_dr_host = platform_device_register_simple(
	"fsl-ehci", i, r, 2);
	if (IS_ERR(usb_dev_dr_host)) {
	ret = PTR_ERR(usb_dev_dr_host);
	goto err;
	}
	usb_dev_dr_client = platform_device_register_simple(
	"fsl-usb2-udc", i, r, 2);
	if (IS_ERR(usb_dev_dr_client)) {
	ret = PTR_ERR(usb_dev_dr_client);
	goto err;
	}
	} else {
	ret = -EINVAL;
	goto err;
	}

	prop = of_get_property(np, "phy_type", NULL);
	usb_data.phy_mode = determine_usb_phy(prop);

	if (usb_dev_dr_host) {
	usb_dev_dr_host->dev.coherent_dma_mask = 0xffffffffUL;
	usb_dev_dr_host->dev.dma_mask = &usb_dev_dr_host->
	dev.coherent_dma_mask;
	if ((ret = platform_device_add_data(usb_dev_dr_host,
	&usb_data, sizeof(struct
	fsl_usb2_platform_data))))
	goto unreg_dr;
	}
	if (usb_dev_dr_client) {
	usb_dev_dr_client->dev.coherent_dma_mask = 0xffffffffUL;
	usb_dev_dr_client->dev.dma_mask = &usb_dev_dr_client->
	dev.coherent_dma_mask;
	if ((ret = platform_device_add_data(usb_dev_dr_client,
	&usb_data, sizeof(struct
	fsl_usb2_platform_data))))
	goto unreg_dr;
	}
	i++;
	}
	return 0;

	unreg_dr:
	if (usb_dev_dr_host)
	platform_device_unregister(usb_dev_dr_host);
	if (usb_dev_dr_client)
	platform_device_unregister(usb_dev_dr_client);
	unreg_mph:
	if (usb_dev_mph)
	platform_device_unregister(usb_dev_mph);
	err:
	return ret;
	}

	arch_initcall(fsl_usb_of_init);

	#if defined(CONFIG_PPC_85xx) \|\| defined(CONFIG_PPC_86xx)
	static __be32 __iomem *rstcr;

	static int __init setup_rstcr(void)
	{
	struct device_node *np;
	np = of_find_node_by_name(NULL, "global-utilities");
	if ((np && of_get_property(np, "fsl,has-rstcr", NULL))) {
	rstcr = of_iomap(np, 0) + 0xb0;
	if (!rstcr)
	printk (KERN_EMERG "Error: reset control register "
	"not mapped!\n");
	} else
	printk (KERN_INFO "rstcr compatible register does not exist!\n");
	if (np)
	of_node_put(np);
	return 0;
	}

	arch_initcall(setup_rstcr);

	void fsl_rstcr_restart(char *cmd)
	{
	local_irq_disable();
	if (rstcr)
	/* set reset control register */
	out_be32(rstcr, 0x2); /* HRESET_REQ */

	while (1) ;
	}
	#endif

	#if defined(CONFIG_FB_FSL_DIU) \|\| defined(CONFIG_FB_FSL_DIU_MODULE)
	struct platform_diu_data_ops diu_ops;
	EXPORT_SYMBOL(diu_ops);
	#endif